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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@52 ec53bebd-3082-4978-b11e-865c3cabbd6b
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Unknown User d91-jda
1995-07-19 18:57:49 +00:00
parent aaf4888290
commit ebd0b9fa73
8 changed files with 4442 additions and 0 deletions
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36
appl/telnet/telnet/Makefile.in Normal file
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# Makefile.in,v 1.2 1994/05/13 05:02:46 assar Exp
srcdir = @srcdir@
VPATH = @srcdir@
SHELL = /bin/sh
CC = @CC@
AR = ar
RANLIB = @RANLIB@
DEFS = @DEFS@
CFLAGS = @CFLAGS@ -I/usr/athena/include -I.. -I$(VPATH)/..
LIBS = @LIBS@
prefix = @prefix@
exec_prefix = $(prefix)
libdir = $(exec_prefix)/lib
SOURCES=commands.c main.c network.c ring.c \
sys_bsd.c telnet.c terminal.c \
utilities.c ${GETOPT_SRC}
OBJECTS=authenc.o commands.o main.o network.o ring.o sys_bsd.o \
telnet.o terminal.o utilities.o ${GETOPT_OBJ}
KLIB=-L/usr/athena/lib -lkrb -ldes
all: telnet
telnet: $(OBJECTS)
$(CC) -o telnet $(OBJECTS) $(LIBS) ../libtelnet/libtelnet.a $(KLIB)
clean cleandir:
rm -f *.o *.a telnet telnetd core

91
appl/telnet/telnetd/authenc.c Normal file
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/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)authenc.c 8.2 (Berkeley) 5/30/95";
#endif /* not lint */
#if defined(AUTHENTICATION) || defined(ENCRYPTION)
#include "telnetd.h"
#include <libtelnet/misc.h>
int
net_write(str, len)
unsigned char *str;
int len;
{
if (nfrontp + len < netobuf + BUFSIZ) {
memmove((void *)nfrontp, (void *)str, len);
nfrontp += len;
return(len);
}
return(0);
}
void
net_encrypt()
{
#if defined(ENCRYPTION)
char *s = (nclearto > nbackp) ? nclearto : nbackp;
if (s < nfrontp && encrypt_output) {
(*encrypt_output)((unsigned char *)s, nfrontp - s);
}
nclearto = nfrontp;
#endif
}
int
telnet_spin()
{
ttloop();
return(0);
}
char *
telnet_getenv(val)
char *val;
{
extern char *getenv();
return(getenv(val));
}
char *
telnet_gets(prompt, result, length, echo)
char *prompt;
char *result;
int length;
int echo;
{
return((char *)0);
}
#endif

296
appl/telnet/telnetd/defs.h Normal file
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/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)defs.h 8.1 (Berkeley) 6/4/93
*/
/*
* Telnet server defines
*/
#include <sys/types.h>
#include <sys/param.h>
#ifndef BSD
# define BSD 43
#endif
#if defined(CRAY) && !defined(LINEMODE)
# define SYSV_TERMIO
# define LINEMODE
# define KLUDGELINEMODE
# define DIAGNOSTICS
# if defined(UNICOS50) && !defined(UNICOS5)
# define UNICOS5
# endif
# if !defined(UNICOS5)
# define BFTPDAEMON
# define HAS_IP_TOS
# endif
#endif /* CRAY */
#if defined(UNICOS5) && !defined(NO_SETSID)
# define NO_SETSID
#endif
#if defined(PRINTOPTIONS) && defined(DIAGNOSTICS)
#define TELOPTS
#define TELCMDS
#define SLC_NAMES
#endif
#if defined(SYSV_TERMIO) && !defined(USE_TERMIO)
# define USE_TERMIO
#endif
#include <sys/socket.h>
#ifndef CRAY
#include <sys/wait.h>
#endif /* CRAY */
#include <fcntl.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/time.h>
#ifndef FILIO_H
#include <sys/ioctl.h>
#else
#include <sys/filio.h>
#endif
#include <netinet/in.h>
#include <arpa/telnet.h>
#include <stdio.h>
#ifdef __STDC__
#include <stdlib.h>
#endif
#include <signal.h>
#include <errno.h>
#include <netdb.h>
#include <syslog.h>
#ifndef LOG_DAEMON
#define LOG_DAEMON 0
#endif
#ifndef LOG_ODELAY
#define LOG_ODELAY 0
#endif
#include <ctype.h>
#ifndef NO_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#ifndef USE_TERMIO
#include <sgtty.h>
#else
# ifdef SYSV_TERMIO
# include <termio.h>
# else
# include <termios.h>
# endif
#endif
#if !defined(USE_TERMIO) || defined(NO_CC_T)
typedef unsigned char cc_t;
#endif
#ifdef __STDC__
#include <unistd.h>
#endif
#ifndef _POSIX_VDISABLE
# ifdef VDISABLE
# define _POSIX_VDISABLE VDISABLE
# else
# define _POSIX_VDISABLE ((unsigned char)'\377')
# endif
#endif
#ifdef CRAY
# ifdef CRAY1
# include <sys/pty.h>
# ifndef FD_ZERO
# include <sys/select.h>
# endif /* FD_ZERO */
# endif /* CRAY1 */
#include <memory.h>
#endif /* CRAY */
#ifdef __hpux
#include <sys/ptyio.h>
#endif
#if !defined(TIOCSCTTY) && defined(TCSETCTTY)
# define TIOCSCTTY TCSETCTTY
#endif
#ifndef FD_SET
#ifndef HAVE_fd_set
typedef struct fd_set { int fds_bits[1]; } fd_set;
#endif
#define FD_SET(n, p) ((p)->fds_bits[0] |= (1<<(n)))
#define FD_CLR(n, p) ((p)->fds_bits[0] &= ~(1<<(n)))
#define FD_ISSET(n, p) ((p)->fds_bits[0] & (1<<(n)))
#define FD_ZERO(p) ((p)->fds_bits[0] = 0)
#endif /* FD_SET */
/*
* I/O data buffers defines
*/
#define NETSLOP 64
#ifdef CRAY
#undef BUFSIZ
#define BUFSIZ 2048
#endif
#define NIACCUM(c) { *netip++ = c; \
ncc++; \
}
/* clock manipulations */
#define settimer(x) (clocks.x = ++clocks.system)
#define sequenceIs(x,y) (clocks.x < clocks.y)
/*
* Linemode support states, in decreasing order of importance
*/
#define REAL_LINEMODE 0x04
#define KLUDGE_OK 0x03
#define NO_AUTOKLUDGE 0x02
#define KLUDGE_LINEMODE 0x01
#define NO_LINEMODE 0x00
/*
* Structures of information for each special character function.
*/
typedef struct {
unsigned char flag; /* the flags for this function */
cc_t val; /* the value of the special character */
} slcent, *Slcent;
typedef struct {
slcent defset; /* the default settings */
slcent current; /* the current settings */
cc_t *sptr; /* a pointer to the char in */
/* system data structures */
} slcfun, *Slcfun;
#ifdef DIAGNOSTICS
/*
* Diagnostics capabilities
*/
#define TD_REPORT 0x01 /* Report operations to client */
#define TD_EXERCISE 0x02 /* Exercise client's implementation */
#define TD_NETDATA 0x04 /* Display received data stream */
#define TD_PTYDATA 0x08 /* Display data passed to pty */
#define TD_OPTIONS 0x10 /* Report just telnet options */
#endif /* DIAGNOSTICS */
/*
* We keep track of each side of the option negotiation.
*/
#define MY_STATE_WILL 0x01
#define MY_WANT_STATE_WILL 0x02
#define MY_STATE_DO 0x04
#define MY_WANT_STATE_DO 0x08
/*
* Macros to check the current state of things
*/
#define my_state_is_do(opt) (options[opt]&MY_STATE_DO)
#define my_state_is_will(opt) (options[opt]&MY_STATE_WILL)
#define my_want_state_is_do(opt) (options[opt]&MY_WANT_STATE_DO)
#define my_want_state_is_will(opt) (options[opt]&MY_WANT_STATE_WILL)
#define my_state_is_dont(opt) (!my_state_is_do(opt))
#define my_state_is_wont(opt) (!my_state_is_will(opt))
#define my_want_state_is_dont(opt) (!my_want_state_is_do(opt))
#define my_want_state_is_wont(opt) (!my_want_state_is_will(opt))
#define set_my_state_do(opt) (options[opt] |= MY_STATE_DO)
#define set_my_state_will(opt) (options[opt] |= MY_STATE_WILL)
#define set_my_want_state_do(opt) (options[opt] |= MY_WANT_STATE_DO)
#define set_my_want_state_will(opt) (options[opt] |= MY_WANT_STATE_WILL)
#define set_my_state_dont(opt) (options[opt] &= ~MY_STATE_DO)
#define set_my_state_wont(opt) (options[opt] &= ~MY_STATE_WILL)
#define set_my_want_state_dont(opt) (options[opt] &= ~MY_WANT_STATE_DO)
#define set_my_want_state_wont(opt) (options[opt] &= ~MY_WANT_STATE_WILL)
/*
* Tricky code here. What we want to know is if the MY_STATE_WILL
* and MY_WANT_STATE_WILL bits have the same value. Since the two
* bits are adjacent, a little arithmatic will show that by adding
* in the lower bit, the upper bit will be set if the two bits were
* different, and clear if they were the same.
*/
#define my_will_wont_is_changing(opt) \
((options[opt]+MY_STATE_WILL) & MY_WANT_STATE_WILL)
#define my_do_dont_is_changing(opt) \
((options[opt]+MY_STATE_DO) & MY_WANT_STATE_DO)
/*
* Make everything symetrical
*/
#define HIS_STATE_WILL MY_STATE_DO
#define HIS_WANT_STATE_WILL MY_WANT_STATE_DO
#define HIS_STATE_DO MY_STATE_WILL
#define HIS_WANT_STATE_DO MY_WANT_STATE_WILL
#define his_state_is_do my_state_is_will
#define his_state_is_will my_state_is_do
#define his_want_state_is_do my_want_state_is_will
#define his_want_state_is_will my_want_state_is_do
#define his_state_is_dont my_state_is_wont
#define his_state_is_wont my_state_is_dont
#define his_want_state_is_dont my_want_state_is_wont
#define his_want_state_is_wont my_want_state_is_dont
#define set_his_state_do set_my_state_will
#define set_his_state_will set_my_state_do
#define set_his_want_state_do set_my_want_state_will
#define set_his_want_state_will set_my_want_state_do
#define set_his_state_dont set_my_state_wont
#define set_his_state_wont set_my_state_dont
#define set_his_want_state_dont set_my_want_state_wont
#define set_his_want_state_wont set_my_want_state_dont
#define his_will_wont_is_changing my_do_dont_is_changing
#define his_do_dont_is_changing my_will_wont_is_changing

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appl/telnet/telnetd/global.c Normal file
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/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)global.c 8.1 (Berkeley) 6/4/93";
#endif /* not lint */
/*
* Allocate global variables. We do this
* by including the header file that defines
* them all as externs, but first we define
* the keyword "extern" to be nothing, so that
* we will actually allocate the space.
*/
#include "defs.h"
#define extern
#include "ext.h"

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appl/telnet/telnetd/slc.c Normal file
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/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)slc.c 8.2 (Berkeley) 5/30/95";
#endif /* not lint */
#include "telnetd.h"
#ifdef LINEMODE
/*
* local varibles
*/
static unsigned char *def_slcbuf = (unsigned char *)0;
static int def_slclen = 0;
static int slcchange; /* change to slc is requested */
static unsigned char *slcptr; /* pointer into slc buffer */
static unsigned char slcbuf[NSLC*6]; /* buffer for slc negotiation */
/*
* send_slc
*
* Write out the current special characters to the client.
*/
void
send_slc()
{
register int i;
/*
* Send out list of triplets of special characters
* to client. We only send info on the characters
* that are currently supported.
*/
for (i = 1; i <= NSLC; i++) {
if ((slctab[i].defset.flag & SLC_LEVELBITS) == SLC_NOSUPPORT)
continue;
add_slc((unsigned char)i, slctab[i].current.flag,
slctab[i].current.val);
}
} /* end of send_slc */
/*
* default_slc
*
* Set pty special characters to all the defaults.
*/
void
default_slc()
{
register int i;
for (i = 1; i <= NSLC; i++) {
slctab[i].current.val = slctab[i].defset.val;
if (slctab[i].current.val == (cc_t)(_POSIX_VDISABLE))
slctab[i].current.flag = SLC_NOSUPPORT;
else
slctab[i].current.flag = slctab[i].defset.flag;
if (slctab[i].sptr) {
*(slctab[i].sptr) = slctab[i].defset.val;
}
}
slcchange = 1;
} /* end of default_slc */
#endif /* LINEMODE */
/*
* get_slc_defaults
*
* Initialize the slc mapping table.
*/
void
get_slc_defaults()
{
register int i;
init_termbuf();
for (i = 1; i <= NSLC; i++) {
slctab[i].defset.flag =
spcset(i, &slctab[i].defset.val, &slctab[i].sptr);
slctab[i].current.flag = SLC_NOSUPPORT;
slctab[i].current.val = 0;
}
} /* end of get_slc_defaults */
#ifdef LINEMODE
/*
* add_slc
*
* Add an slc triplet to the slc buffer.
*/
void
add_slc(func, flag, val)
register char func, flag;
register cc_t val;
{
if ((*slcptr++ = (unsigned char)func) == 0xff)
*slcptr++ = 0xff;
if ((*slcptr++ = (unsigned char)flag) == 0xff)
*slcptr++ = 0xff;
if ((*slcptr++ = (unsigned char)val) == 0xff)
*slcptr++ = 0xff;
} /* end of add_slc */
/*
* start_slc
*
* Get ready to process incoming slc's and respond to them.
*
* The parameter getit is non-zero if it is necessary to grab a copy
* of the terminal control structures.
*/
void
start_slc(getit)
register int getit;
{
slcchange = 0;
if (getit)
init_termbuf();
(void) sprintf((char *)slcbuf, "%c%c%c%c",
IAC, SB, TELOPT_LINEMODE, LM_SLC);
slcptr = slcbuf + 4;
} /* end of start_slc */
/*
* end_slc
*
* Finish up the slc negotiation. If something to send, then send it.
*/
int
end_slc(bufp)
register unsigned char **bufp;
{
register int len;
void netflush();
/*
* If a change has occured, store the new terminal control
* structures back to the terminal driver.
*/
if (slcchange) {
set_termbuf();
}
/*
* If the pty state has not yet been fully processed and there is a
* deferred slc request from the client, then do not send any
* sort of slc negotiation now. We will respond to the client's
* request very soon.
*/
if (def_slcbuf && (terminit() == 0)) {
return(0);
}
if (slcptr > (slcbuf + 4)) {
if (bufp) {
*bufp = &slcbuf[4];
return(slcptr - slcbuf - 4);
} else {
(void) sprintf((char *)slcptr, "%c%c", IAC, SE);
slcptr += 2;
len = slcptr - slcbuf;
writenet(slcbuf, len);
netflush(); /* force it out immediately */
DIAG(TD_OPTIONS, printsub('>', slcbuf+2, len-2););
}
}
return (0);
} /* end of end_slc */
/*
* process_slc
*
* Figure out what to do about the client's slc
*/
void
process_slc(func, flag, val)
register unsigned char func, flag;
register cc_t val;
{
register int hislevel, mylevel, ack;
/*
* Ensure that we know something about this function
*/
if (func > NSLC) {
add_slc(func, SLC_NOSUPPORT, 0);
return;
}
/*
* Process the special case requests of 0 SLC_DEFAULT 0
* and 0 SLC_VARIABLE 0. Be a little forgiving here, don't
* worry about whether the value is actually 0 or not.
*/
if (func == 0) {
if ((flag = flag & SLC_LEVELBITS) == SLC_DEFAULT) {
default_slc();
send_slc();
} else if (flag == SLC_VARIABLE) {
send_slc();
}
return;
}
/*
* Appears to be a function that we know something about. So
* get on with it and see what we know.
*/
hislevel = flag & SLC_LEVELBITS;
mylevel = slctab[func].current.flag & SLC_LEVELBITS;
ack = flag & SLC_ACK;
/*
* ignore the command if:
* the function value and level are the same as what we already have;
* or the level is the same and the ack bit is set
*/
if (hislevel == mylevel && (val == slctab[func].current.val || ack)) {
return;
} else if (ack) {
/*
* If we get here, we got an ack, but the levels don't match.
* This shouldn't happen. If it does, it is probably because
* we have sent two requests to set a variable without getting
* a response between them, and this is the first response.
* So, ignore it, and wait for the next response.
*/
return;
} else {
change_slc(func, flag, val);
}
} /* end of process_slc */
/*
* change_slc
*
* Process a request to change one of our special characters.
* Compare client's request with what we are capable of supporting.
*/
void
change_slc(func, flag, val)
register char func, flag;
register cc_t val;
{
register int hislevel, mylevel;
hislevel = flag & SLC_LEVELBITS;
mylevel = slctab[func].defset.flag & SLC_LEVELBITS;
/*
* If client is setting a function to NOSUPPORT
* or DEFAULT, then we can easily and directly
* accomodate the request.
*/
if (hislevel == SLC_NOSUPPORT) {
slctab[func].current.flag = flag;
slctab[func].current.val = (cc_t)_POSIX_VDISABLE;
flag |= SLC_ACK;
add_slc(func, flag, val);
return;
}
if (hislevel == SLC_DEFAULT) {
/*
* Special case here. If client tells us to use
* the default on a function we don't support, then
* return NOSUPPORT instead of what we may have as a
* default level of DEFAULT.
*/
if (mylevel == SLC_DEFAULT) {
slctab[func].current.flag = SLC_NOSUPPORT;
} else {
slctab[func].current.flag = slctab[func].defset.flag;
}
slctab[func].current.val = slctab[func].defset.val;
add_slc(func, slctab[func].current.flag,
slctab[func].current.val);
return;
}
/*
* Client wants us to change to a new value or he
* is telling us that he can't change to our value.
* Some of the slc's we support and can change,
* some we do support but can't change,
* and others we don't support at all.
* If we can change it then we have a pointer to
* the place to put the new value, so change it,
* otherwise, continue the negotiation.
*/
if (slctab[func].sptr) {
/*
* We can change this one.
*/
slctab[func].current.val = val;
*(slctab[func].sptr) = val;
slctab[func].current.flag = flag;
flag |= SLC_ACK;
slcchange = 1;
add_slc(func, flag, val);
} else {
/*
* It is not possible for us to support this
* request as he asks.
*
* If our level is DEFAULT, then just ack whatever was
* sent.
*
* If he can't change and we can't change,
* then degenerate to NOSUPPORT.
*
* Otherwise we send our level back to him, (CANTCHANGE
* or NOSUPPORT) and if CANTCHANGE, send
* our value as well.
*/
if (mylevel == SLC_DEFAULT) {
slctab[func].current.flag = flag;
slctab[func].current.val = val;
flag |= SLC_ACK;
} else if (hislevel == SLC_CANTCHANGE &&
mylevel == SLC_CANTCHANGE) {
flag &= ~SLC_LEVELBITS;
flag |= SLC_NOSUPPORT;
slctab[func].current.flag = flag;
} else {
flag &= ~SLC_LEVELBITS;
flag |= mylevel;
slctab[func].current.flag = flag;
if (mylevel == SLC_CANTCHANGE) {
slctab[func].current.val =
slctab[func].defset.val;
val = slctab[func].current.val;
}
}
add_slc(func, flag, val);
}
} /* end of change_slc */
#if defined(USE_TERMIO) && (VEOF == VMIN)
cc_t oldeofc = '\004';
#endif
/*
* check_slc
*
* Check the special characters in use and notify the client if any have
* changed. Only those characters that are capable of being changed are
* likely to have changed. If a local change occurs, kick the support level
* and flags up to the defaults.
*/
void
check_slc()
{
register int i;
for (i = 1; i <= NSLC; i++) {
#if defined(USE_TERMIO) && (VEOF == VMIN)
/*
* In a perfect world this would be a neat little
* function. But in this world, we should not notify
* client of changes to the VEOF char when
* ICANON is off, because it is not representing
* a special character.
*/
if (i == SLC_EOF) {
if (!tty_isediting())
continue;
else if (slctab[i].sptr)
oldeofc = *(slctab[i].sptr);
}
#endif /* defined(USE_TERMIO) && defined(SYSV_TERMIO) */
if (slctab[i].sptr &&
(*(slctab[i].sptr) != slctab[i].current.val)) {
slctab[i].current.val = *(slctab[i].sptr);
if (*(slctab[i].sptr) == (cc_t)_POSIX_VDISABLE)
slctab[i].current.flag = SLC_NOSUPPORT;
else
slctab[i].current.flag = slctab[i].defset.flag;
add_slc((unsigned char)i, slctab[i].current.flag,
slctab[i].current.val);
}
}
} /* check_slc */
/*
* do_opt_slc
*
* Process an slc option buffer. Defer processing of incoming slc's
* until after the terminal state has been processed. Save the first slc
* request that comes along, but discard all others.
*
* ptr points to the beginning of the buffer, len is the length.
*/
void
do_opt_slc(ptr, len)
register unsigned char *ptr;
register int len;
{
register unsigned char func, flag;
cc_t val;
register unsigned char *end = ptr + len;
if (terminit()) { /* go ahead */
while (ptr < end) {
func = *ptr++;
if (ptr >= end) break;
flag = *ptr++;
if (ptr >= end) break;
val = (cc_t)*ptr++;
process_slc(func, flag, val);
}
} else {
/*
* save this slc buffer if it is the first, otherwise dump
* it.
*/
if (def_slcbuf == (unsigned char *)0) {
def_slclen = len;
def_slcbuf = (unsigned char *)malloc((unsigned)len);
if (def_slcbuf == (unsigned char *)0)
return; /* too bad */
memmove(def_slcbuf, ptr, len);
}
}
} /* end of do_opt_slc */
/*
* deferslc
*
* Do slc stuff that was deferred.
*/
void
deferslc()
{
if (def_slcbuf) {
start_slc(1);
do_opt_slc(def_slcbuf, def_slclen);
(void) end_slc(0);
free(def_slcbuf);
def_slcbuf = (unsigned char *)0;
def_slclen = 0;
}
} /* end of deferslc */
#endif /* LINEMODE */

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appl/telnet/telnetd/telnetd.c Normal file
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/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)termstat.c 8.2 (Berkeley) 5/30/95";
#endif /* not lint */
#include "telnetd.h"
/*
* local variables
*/
int def_tspeed = -1, def_rspeed = -1;
#ifdef TIOCSWINSZ
int def_row = 0, def_col = 0;
#endif
#ifdef LINEMODE
static int _terminit = 0;
#endif /* LINEMODE */
#if defined(CRAY2) && defined(UNICOS5)
int newmap = 1; /* nonzero if \n maps to ^M^J */
#endif
#ifdef LINEMODE
/*
* localstat
*
* This function handles all management of linemode.
*
* Linemode allows the client to do the local editing of data
* and send only complete lines to the server. Linemode state is
* based on the state of the pty driver. If the pty is set for
* external processing, then we can use linemode. Further, if we
* can use real linemode, then we can look at the edit control bits
* in the pty to determine what editing the client should do.
*
* Linemode support uses the following state flags to keep track of
* current and desired linemode state.
* alwayslinemode : true if -l was specified on the telnetd
* command line. It means to have linemode on as much as
* possible.
*
* lmodetype: signifies whether the client can
* handle real linemode, or if use of kludgeomatic linemode
* is preferred. It will be set to one of the following:
* REAL_LINEMODE : use linemode option
* NO_KLUDGE : don't initiate kludge linemode.
* KLUDGE_LINEMODE : use kludge linemode
* NO_LINEMODE : client is ignorant of linemode
*
* linemode, uselinemode : linemode is true if linemode
* is currently on, uselinemode is the state that we wish
* to be in. If another function wishes to turn linemode
* on or off, it sets or clears uselinemode.
*
* editmode, useeditmode : like linemode/uselinemode, but
* these contain the edit mode states (edit and trapsig).
*
* The state variables correspond to some of the state information
* in the pty.
* linemode:
* In real linemode, this corresponds to whether the pty
* expects external processing of incoming data.
* In kludge linemode, this more closely corresponds to the
* whether normal processing is on or not. (ICANON in
* system V, or COOKED mode in BSD.)
* If the -l option was specified (alwayslinemode), then
* an attempt is made to force external processing on at
* all times.
*
* The following heuristics are applied to determine linemode
* handling within the server.
* 1) Early on in starting up the server, an attempt is made
* to negotiate the linemode option. If this succeeds
* then lmodetype is set to REAL_LINEMODE and all linemode
* processing occurs in the context of the linemode option.
* 2) If the attempt to negotiate the linemode option failed,
* and the "-k" (don't initiate kludge linemode) isn't set,
* then we try to use kludge linemode. We test for this
* capability by sending "do Timing Mark". If a positive
* response comes back, then we assume that the client
* understands kludge linemode (ech!) and the
* lmodetype flag is set to KLUDGE_LINEMODE.
* 3) Otherwise, linemode is not supported at all and
* lmodetype remains set to NO_LINEMODE (which happens
* to be 0 for convenience).
* 4) At any time a command arrives that implies a higher
* state of linemode support in the client, we move to that
* linemode support.
*
* A short explanation of kludge linemode is in order here.
* 1) The heuristic to determine support for kludge linemode
* is to send a do timing mark. We assume that a client
* that supports timing marks also supports kludge linemode.
* A risky proposition at best.
* 2) Further negotiation of linemode is done by changing the
* the server's state regarding SGA. If server will SGA,
* then linemode is off, if server won't SGA, then linemode
* is on.
*/
void
localstat()
{
void netflush();
int need_will_echo = 0;
#if defined(CRAY2) && defined(UNICOS5)
/*
* Keep track of that ol' CR/NL mapping while we're in the
* neighborhood.
*/
newmap = tty_isnewmap();
#endif /* defined(CRAY2) && defined(UNICOS5) */
/*
* Check for state of BINARY options.
*/
if (tty_isbinaryin()) {
if (his_want_state_is_wont(TELOPT_BINARY))
send_do(TELOPT_BINARY, 1);
} else {
if (his_want_state_is_will(TELOPT_BINARY))
send_dont(TELOPT_BINARY, 1);
}
if (tty_isbinaryout()) {
if (my_want_state_is_wont(TELOPT_BINARY))
send_will(TELOPT_BINARY, 1);
} else {
if (my_want_state_is_will(TELOPT_BINARY))
send_wont(TELOPT_BINARY, 1);
}
/*
* Check for changes to flow control if client supports it.
*/
flowstat();
/*
* Check linemode on/off state
*/
uselinemode = tty_linemode();
/*
* If alwayslinemode is on, and pty is changing to turn it off, then
* force linemode back on.
*/
if (alwayslinemode && linemode && !uselinemode) {
uselinemode = 1;
tty_setlinemode(uselinemode);
}
#if defined(ENCRYPTION)
/*
* If the terminal is not echoing, but editing is enabled,
* something like password input is going to happen, so
* if we the other side is not currently sending encrypted
* data, ask the other side to start encrypting.
*/
if (his_state_is_will(TELOPT_ENCRYPT)) {
static int enc_passwd = 0;
if (uselinemode && !tty_isecho() && tty_isediting()
&& (enc_passwd == 0) && !decrypt_input) {
encrypt_send_request_start();
enc_passwd = 1;
} else if (enc_passwd) {
encrypt_send_request_end();
enc_passwd = 0;
}
}
#endif
/*
* Do echo mode handling as soon as we know what the
* linemode is going to be.
* If the pty has echo turned off, then tell the client that
* the server will echo. If echo is on, then the server
* will echo if in character mode, but in linemode the
* client should do local echoing. The state machine will
* not send anything if it is unnecessary, so don't worry
* about that here.
*
* If we need to send the WILL ECHO (because echo is off),
* then delay that until after we have changed the MODE.
* This way, when the user is turning off both editing
* and echo, the client will get editing turned off first.
* This keeps the client from going into encryption mode
* and then right back out if it is doing auto-encryption
* when passwords are being typed.
*/
if (uselinemode) {
if (tty_isecho())
send_wont(TELOPT_ECHO, 1);
else
need_will_echo = 1;
#ifdef KLUDGELINEMODE
if (lmodetype == KLUDGE_OK)
lmodetype = KLUDGE_LINEMODE;
#endif
}
/*
* If linemode is being turned off, send appropriate
* command and then we're all done.
*/
if (!uselinemode && linemode) {
# ifdef KLUDGELINEMODE
if (lmodetype == REAL_LINEMODE) {
# endif /* KLUDGELINEMODE */
send_dont(TELOPT_LINEMODE, 1);
# ifdef KLUDGELINEMODE
} else if (lmodetype == KLUDGE_LINEMODE)
send_will(TELOPT_SGA, 1);
# endif /* KLUDGELINEMODE */
send_will(TELOPT_ECHO, 1);
linemode = uselinemode;
goto done;
}
# ifdef KLUDGELINEMODE
/*
* If using real linemode check edit modes for possible later use.
* If we are in kludge linemode, do the SGA negotiation.
*/
if (lmodetype == REAL_LINEMODE) {
# endif /* KLUDGELINEMODE */
useeditmode = 0;
if (tty_isediting())
useeditmode |= MODE_EDIT;
if (tty_istrapsig())
useeditmode |= MODE_TRAPSIG;
if (tty_issofttab())
useeditmode |= MODE_SOFT_TAB;
if (tty_islitecho())
useeditmode |= MODE_LIT_ECHO;
# ifdef KLUDGELINEMODE
} else if (lmodetype == KLUDGE_LINEMODE) {
if (tty_isediting() && uselinemode)
send_wont(TELOPT_SGA, 1);
else
send_will(TELOPT_SGA, 1);
}
# endif /* KLUDGELINEMODE */
/*
* Negotiate linemode on if pty state has changed to turn it on.
* Send appropriate command and send along edit mode, then all done.
*/
if (uselinemode && !linemode) {
# ifdef KLUDGELINEMODE
if (lmodetype == KLUDGE_LINEMODE) {
send_wont(TELOPT_SGA, 1);
} else if (lmodetype == REAL_LINEMODE) {
# endif /* KLUDGELINEMODE */
send_do(TELOPT_LINEMODE, 1);
/* send along edit modes */
(void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC, SB,
TELOPT_LINEMODE, LM_MODE, useeditmode,
IAC, SE);
nfrontp += 7;
editmode = useeditmode;
# ifdef KLUDGELINEMODE
}
# endif /* KLUDGELINEMODE */
linemode = uselinemode;
goto done;
}
# ifdef KLUDGELINEMODE
/*
* None of what follows is of any value if not using
* real linemode.
*/
if (lmodetype < REAL_LINEMODE)
goto done;
# endif /* KLUDGELINEMODE */
if (linemode && his_state_is_will(TELOPT_LINEMODE)) {
/*
* If edit mode changed, send edit mode.
*/
if (useeditmode != editmode) {
/*
* Send along appropriate edit mode mask.
*/
(void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC, SB,
TELOPT_LINEMODE, LM_MODE, useeditmode,
IAC, SE);
nfrontp += 7;
editmode = useeditmode;
}
/*
* Check for changes to special characters in use.
*/
start_slc(0);
check_slc();
(void) end_slc(0);
}
done:
if (need_will_echo)
send_will(TELOPT_ECHO, 1);
/*
* Some things should be deferred until after the pty state has
* been set by the local process. Do those things that have been
* deferred now. This only happens once.
*/
if (_terminit == 0) {
_terminit = 1;
defer_terminit();
}
netflush();
set_termbuf();
return;
} /* end of localstat */
#endif /* LINEMODE */
/*
* flowstat
*
* Check for changes to flow control
*/
void
flowstat()
{
if (his_state_is_will(TELOPT_LFLOW)) {
if (tty_flowmode() != flowmode) {
flowmode = tty_flowmode();
(void) sprintf(nfrontp, "%c%c%c%c%c%c",
IAC, SB, TELOPT_LFLOW,
flowmode ? LFLOW_ON : LFLOW_OFF,
IAC, SE);
nfrontp += 6;
}
if (tty_restartany() != restartany) {
restartany = tty_restartany();
(void) sprintf(nfrontp, "%c%c%c%c%c%c",
IAC, SB, TELOPT_LFLOW,
restartany ? LFLOW_RESTART_ANY
: LFLOW_RESTART_XON,
IAC, SE);
nfrontp += 6;
}
}
}
/*
* clientstat
*
* Process linemode related requests from the client.
* Client can request a change to only one of linemode, editmode or slc's
* at a time, and if using kludge linemode, then only linemode may be
* affected.
*/
void
clientstat(code, parm1, parm2)
register int code, parm1, parm2;
{
void netflush();
/*
* Get a copy of terminal characteristics.
*/
init_termbuf();
/*
* Process request from client. code tells what it is.
*/
switch (code) {
#ifdef LINEMODE
case TELOPT_LINEMODE:
/*
* Don't do anything unless client is asking us to change
* modes.
*/
uselinemode = (parm1 == WILL);
if (uselinemode != linemode) {
# ifdef KLUDGELINEMODE
/*
* If using kludge linemode, make sure that
* we can do what the client asks.
* We can not turn off linemode if alwayslinemode
* and the ICANON bit is set.
*/
if (lmodetype == KLUDGE_LINEMODE) {
if (alwayslinemode && tty_isediting()) {
uselinemode = 1;
}
}
/*
* Quit now if we can't do it.
*/
if (uselinemode == linemode)
return;
/*
* If using real linemode and linemode is being
* turned on, send along the edit mode mask.
*/
if (lmodetype == REAL_LINEMODE && uselinemode)
# else /* KLUDGELINEMODE */
if (uselinemode)
# endif /* KLUDGELINEMODE */
{
useeditmode = 0;
if (tty_isediting())
useeditmode |= MODE_EDIT;
if (tty_istrapsig)
useeditmode |= MODE_TRAPSIG;
if (tty_issofttab())
useeditmode |= MODE_SOFT_TAB;
if (tty_islitecho())
useeditmode |= MODE_LIT_ECHO;
(void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC,
SB, TELOPT_LINEMODE, LM_MODE,
useeditmode, IAC, SE);
nfrontp += 7;
editmode = useeditmode;
}
tty_setlinemode(uselinemode);
linemode = uselinemode;
if (!linemode)
send_will(TELOPT_ECHO, 1);
}
break;
case LM_MODE:
{
register int ack, changed;
/*
* Client has sent along a mode mask. If it agrees with
* what we are currently doing, ignore it; if not, it could
* be viewed as a request to change. Note that the server
* will change to the modes in an ack if it is different from
* what we currently have, but we will not ack the ack.
*/
useeditmode &= MODE_MASK;
ack = (useeditmode & MODE_ACK);
useeditmode &= ~MODE_ACK;
if (changed = (useeditmode ^ editmode)) {
/*
* This check is for a timing problem. If the
* state of the tty has changed (due to the user
* application) we need to process that info
* before we write in the state contained in the
* ack!!! This gets out the new MODE request,
* and when the ack to that command comes back
* we'll set it and be in the right mode.
*/
if (ack)
localstat();
if (changed & MODE_EDIT)
tty_setedit(useeditmode & MODE_EDIT);
if (changed & MODE_TRAPSIG)
tty_setsig(useeditmode & MODE_TRAPSIG);
if (changed & MODE_SOFT_TAB)
tty_setsofttab(useeditmode & MODE_SOFT_TAB);
if (changed & MODE_LIT_ECHO)
tty_setlitecho(useeditmode & MODE_LIT_ECHO);
set_termbuf();
if (!ack) {
(void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC,
SB, TELOPT_LINEMODE, LM_MODE,
useeditmode|MODE_ACK,
IAC, SE);
nfrontp += 7;
}
editmode = useeditmode;
}
break;
} /* end of case LM_MODE */
#endif /* LINEMODE */
case TELOPT_NAWS:
#ifdef TIOCSWINSZ
{
struct winsize ws;
def_col = parm1;
def_row = parm2;
#ifdef LINEMODE
/*
* Defer changing window size until after terminal is
* initialized.
*/
if (terminit() == 0)
return;
#endif /* LINEMODE */
/*
* Change window size as requested by client.
*/
ws.ws_col = parm1;
ws.ws_row = parm2;
(void) ioctl(pty, TIOCSWINSZ, (char *)&ws);
}
#endif /* TIOCSWINSZ */
break;
case TELOPT_TSPEED:
{
def_tspeed = parm1;
def_rspeed = parm2;
#ifdef LINEMODE
/*
* Defer changing the terminal speed.
*/
if (terminit() == 0)
return;
#endif /* LINEMODE */
/*
* Change terminal speed as requested by client.
* We set the receive speed first, so that if we can't
* store seperate receive and transmit speeds, the transmit
* speed will take precedence.
*/
tty_rspeed(parm2);
tty_tspeed(parm1);
set_termbuf();
break;
} /* end of case TELOPT_TSPEED */
default:
/* What? */
break;
} /* end of switch */
#if defined(CRAY2) && defined(UNICOS5)
/*
* Just in case of the likely event that we changed the pty state.
*/
rcv_ioctl();
#endif /* defined(CRAY2) && defined(UNICOS5) */
netflush();
} /* end of clientstat */
#if defined(CRAY2) && defined(UNICOS5)
void
termstat()
{
needtermstat = 1;
}
void
_termstat()
{
needtermstat = 0;
init_termbuf();
localstat();
rcv_ioctl();
}
#endif /* defined(CRAY2) && defined(UNICOS5) */
#ifdef LINEMODE
/*
* defer_terminit
*
* Some things should not be done until after the login process has started
* and all the pty modes are set to what they are supposed to be. This
* function is called when the pty state has been processed for the first time.
* It calls other functions that do things that were deferred in each module.
*/
void
defer_terminit()
{
/*
* local stuff that got deferred.
*/
if (def_tspeed != -1) {
clientstat(TELOPT_TSPEED, def_tspeed, def_rspeed);
def_tspeed = def_rspeed = 0;
}
#ifdef TIOCSWINSZ
if (def_col || def_row) {
struct winsize ws;
memset((char *)&ws, 0, sizeof(ws));
ws.ws_col = def_col;
ws.ws_row = def_row;
(void) ioctl(pty, TIOCSWINSZ, (char *)&ws);
}
#endif
/*
* The only other module that currently defers anything.
*/
deferslc();
} /* end of defer_terminit */
/*
* terminit
*
* Returns true if the pty state has been processed yet.
*/
int
terminit()
{
return(_terminit);
} /* end of terminit */
#endif /* LINEMODE */

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